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(Character Sets): Document `map-charset-chars'.

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Eli Zaretskii 2008-12-05 16:30:01 +00:00
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1
doc/lispref/ChangeLog
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@ -4,6 +4,7 @@
paragraph to speak about `undecided'.
(Character Properties): Don't explain the meaning of each
property; instead, identify their Unicode Standard names.
(Character Sets): Document `map-charset-chars'.
2008-12-02 Glenn Morris <rgm@gnu.org>

17
doc/lispref/nonascii.texi
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@ -626,6 +626,23 @@ integer, it is returned as a cons cell @code{(@var{high} . @var{low})}
that fits the second argument of @code{decode-char} above. If
@var{charset} doesn't have a codepoint for @var{char}, the value is
@code{nil}.
@end defun
The following function comes in handy for applying a certain
function to all or part of the characters in a charset:
@defun map-charset-chars function charset &optional arg from to
Call @var{function} for characters in @var{charset}. @var{function}
is called with two arguments. The first one is a cons cell
@code{(@var{from} . @var{to})}, where @var{from} and @var{to}
indicate a range of characters contained in charset. The second
argument is the optional argument @var{arg}.
By default, the range of codepoints passed to @var{function} includes
all the characters in @var{charset}, but optional arguments @var{from}
and @var{to} limit that to the range of characters between these two
codepoints. If either of them is @code{nil}, it defaults to the first
or last codepoint of @var{charset}, respectively.
@end defun
@node Scanning Charsets